Hi Michael,

I've come across similar situations with some Rhino files (3DM files) before.
Just out of habit I always tend to open most of them with MoI first.
These particular Rhino files only had STL mesh data within them & of course this can't be read by MoI.
Had me scratching my head at first wondering "why can't I see anything"??
That was until I opened the same files with Rhino & then I realised the answer!!

Not a big deal if you have both Rhino & MoI, but I can see how easy it is to get caught out if you're not familiar with the "whys & wherefores" of 3DM files.

regards Colin